الَّذِينَ يَجْتَنِبُونَ كَبَائِرَ الْإِثْمِ وَالْفَوَاحِشَ إِلَّا اللَّمَمَ إِنَّ رَبَّكَ وَاسِعُ الْمَغْفِرَةِ هُوَ أَعْلَمُ بِكُمْ إِذْ أَنْشَأَكُمْ مِنَ الْأَرْضِ وَإِذْ أَنْتُمْ أَجِنَّةٌ فِي بُطُونِ أُمَّهَاتِكُمْ فَلَا تُزَكُّوا أَنْفُسَكُمْ هُوَ أَعْلَمُ بِمَنِ اتَّقَى[ (For) those who avoid major sins and indecencies, the small faults are excepted; surely, for them your Lord will have abundant forgiveness. He knows you well ever since He created you from the earth and ever since you were embryos in your mothers' wombs. So do not attest to your own virtues; He knows best those who are mindful of Him. ]

The above verse indicates that self proclamation of virtue is not a desirable thing. A man should always seek Allah's (عَزَّ وَجَلَّ) forgiveness for his sins known to him and those that are not known to him.

Juz 27, An-Najm, Verse 033

أَفَرَأَيْتَ الَّذِي تَوَلَّى[ Have you seen the one who turned away (from Islam) ]

This verse is reported to be related to one Waleed bin Mugheerah, who wanted to accept Islam but someone promised him to take the punishment on his behalf for certain amount of money. Thus he gave him part of the promised money and turned away from Islam.

Juz 27, An-Najm, Verse 034

وَأَعْطَى قَلِيلًا وَأَكْدَى[ He gave a little from the promised amount then stopped. ]

Juz 27, An-Najm, Verse 035

أَعِنْدَهُ عِلْمُ الْغَيْبِ فَهُوَ يَرَى[ Does he have the knowledge of the unseen so that he sees (the Hereafter)? ]

Juz 27, An-Najm, Verse 036

أَمْ لَمْ يُنَبَّأْ بِمَا فِي صُحُفِ مُوسَى[ Does he not have any knowledge of what is (revealed) in the book of Musa (عليه السلام), ]

فَاسْجُدُوا لِلَّهِ وَاعْبُدُوا[ Prostrate yourselves before Allah and worship Him while you can! ]

The above is the 'verse of Sajda' (آیت سجدہ). If someone is reading it alone, should do prostration (سجدة) alone. If it is read loudly in an audience, the reciter and all the listeners should do 'Prostration of Recitation' (Sajda-e-Tilaawah - سجدة التلاوة) individually.

The Prostration can be done in sitting or standing position. In the Hanafi school of thought, 'Prostration of Recitation' (Sajda-e-Tilaawah - سجدة التلاوة) is obligatory (Fardh). With Shafii and Maliki, it is Sunnah.

It is in Hadith - 'When you have recited a verse requiring Sajdah-e-Tilaawaah, you should go down for Sajdah with Allahu-Akbar and rise from Sajdah with Allahu-Akbar, which may be performed sitting, though it is preferable to prostrate oneself from the standing position. (Abu Dawood)

Have the intention to do Prostration of recitation (سجدة التلاوة). The place where you are reading/reciting Quran should be clean. Turn towards Qibla, say (quietly) Allahu Akbar, go into prostration once, recite the 'Tasbih of Sajdah' 'Subhana Rabbi al-A'alaa' (سبحان ربّي الاعلى ) at least 3 times and raise from the Sajda saying Allahu Akbar.